GetColorAdjustment

// GDI32.dll
#include <windows.h>

BOOL GetColorAdjustment(
    HDC hdc,
    COLORADJUSTMENT* lpca
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function GetColorAdjustment(
    hdc As IntPtr,   ' HDC
    lpca As IntPtr   ' COLORADJUSTMENT* out
) As Boolean
End Function

' hdc : HDC
' lpca : COLORADJUSTMENT* out
Declare PtrSafe Function GetColorAdjustment Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal lpca As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetColorAdjustment = ctypes.windll.gdi32.GetColorAdjustment
GetColorAdjustment.restype = wintypes.BOOL
GetColorAdjustment.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_void_p,  # lpca : COLORADJUSTMENT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetColorAdjustment = Fiddle::Function.new(
  lib['GetColorAdjustment'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # lpca : COLORADJUSTMENT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn GetColorAdjustment(
        hdc: *mut core::ffi::c_void,  // HDC
        lpca: *mut COLORADJUSTMENT  // COLORADJUSTMENT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool GetColorAdjustment(IntPtr hdc, IntPtr lpca);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetColorAdjustment' -Namespace Win32 -PassThru
# $api::GetColorAdjustment(hdc, lpca)

#uselib "GDI32.dll"
#func global GetColorAdjustment "GetColorAdjustment" sptr, sptr
; GetColorAdjustment hdc, varptr(lpca)   ; 戻り値は stat
; hdc : HDC -> "sptr"
; lpca : COLORADJUSTMENT* out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "GDI32.dll"
#cfunc global GetColorAdjustment "GetColorAdjustment" sptr, var
; res = GetColorAdjustment(hdc, lpca)
; hdc : HDC -> "sptr"
; lpca : COLORADJUSTMENT* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL GetColorAdjustment(HDC hdc, COLORADJUSTMENT* lpca)
#uselib "GDI32.dll"
#cfunc global GetColorAdjustment "GetColorAdjustment" intptr, var
; res = GetColorAdjustment(hdc, lpca)
; hdc : HDC -> "intptr"
; lpca : COLORADJUSTMENT* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procGetColorAdjustment = gdi32.NewProc("GetColorAdjustment")
)

// hdc (HDC), lpca (COLORADJUSTMENT* out)
r1, _, err := procGetColorAdjustment.Call(
	uintptr(hdc),
	uintptr(lpca),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetColorAdjustment(
  hdc: THandle;   // HDC
  lpca: Pointer   // COLORADJUSTMENT* out
): BOOL; stdcall;
  external 'GDI32.dll' name 'GetColorAdjustment';

result := DllCall("GDI32\GetColorAdjustment"
    , "Ptr", hdc   ; HDC
    , "Ptr", lpca   ; COLORADJUSTMENT* out
    , "Int")   ; return: BOOL

●GetColorAdjustment(hdc, lpca) = DLL("GDI32.dll", "bool GetColorAdjustment(void*, void*)")
# 呼び出し: GetColorAdjustment(hdc, lpca)
# hdc : HDC -> "void*"
# lpca : COLORADJUSTMENT* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。